Driving device, spraying device, and unmanned aerial vehicle

ABSTRACT

A driving device, a spraying device having the driving device, and an unmanned aerial vehicle having the spraying device are provided. The driving device includes a driving assembly and an abutting assembly. The driving assembly includes a driving motor ( 31 ). The driving motor ( 31 ) has a driving shaft ( 32 ). The abutting assembly is connected to the driving assembly and exerts an acting force on the driving shaft ( 32 ) to abut against the driving shaft ( 32 ).

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a 35 U.S.C. 371 National Stage Patent Application ofInternational Application No. PCT/CN2018/114562, filed Nov. 8, 2018,which claims priority to Chinese application No. 201711424888.1, filedDec. 25, 2017, each of which is hereby incorporated by reference in itsentirety.

TECHNICAL FIELD

The disclosure belongs to the technical field of unmanned aerialvehicles, and more particularly relates to a driving device, a sprayingdevice and an unmanned aerial vehicle.

BACKGROUND

In recent years, with the development of unmanned aerial vehicles (i.e.,an unmanned aerial vehicle technology), due to maneuverability, fastresponse, unmanned flight, low operating requirements and the like, itis applied in many fields, especially in the field of agricultural plantprotection. The application of plant protection unmanned aerial vehiclesfor spraying crops not only improves the spraying efficiency, but alsoeffectively protects operators from being harmed by sprayed liquidchemicals.

A spraying device is an important device in the spraying operationprocess of a plant protection unmanned aerial vehicle, and includes: adriving device and a spraying tray. A driving motor of the drivingdevice provides power to the spraying tray. The driving motor is housedin a housing of the driving motor. The housing is provided with athrough hole. A driving shaft of the driving motor penetrates throughthe through hole and is fixedly connected to the spraying tray. Duringthe operation, the driving shaft of the driving motor drives thespraying tray to rotate and spray liquid. In the conventional art, underthe influence of own vibration and/or unmanned aerial vehicle vibration,the spraying tray drives the driving shaft of the driving motor tofloat, which causes serious wear of the driving shaft and internalwindings thereof, thereby greatly shortening the service life of thedriving device.

SUMMARY

The embodiments of the disclosure are implemented as follows. A drivingdevice may include: a driving assembly and at least one abuttingassembly. The driving assembly may include a driving motor. The drivingmotor may have a driving shaft. The abutting assembly may be connectedto the driving assembly and may exert an acting force on the drivingshaft to abut against the driving shaft.

As a preferred technical solution of the embodiments of the disclosure:

Optionally, the abutting assembly may include a first abutting member,the first abutting member being connected to the driving motor or ahousing of the driving motor.

Optionally, the first abutting member may include a fixing portion andan abutting portion, the fixing portion being connected to the drivingmotor or a housing of the driving motor, and the abutting portionabutting against the driving shaft.

Optionally, the first abutting member may further include a connectingportion for connecting the fixing portion and the abutting portion, theconnecting portion and the abutting portion may jointly form an archedstructure, and the abutting portion, the fixing portion and theconnecting portion may be integrally formed.

Optionally, the abutting portion may be provided with an elasticabutting piece.

Optionally, the abutting portion may be provided with an extending hole,the elastic abutting piece being formed by extending along an inner wallof the extending hole.

Optionally, the abutting assembly may further include a second abuttingmember, the second abutting member being buckled on an end of thedriving shaft adjacent to the first abutting member.

Optionally, an end of the second abutting member adjacent to the firstabutting member may be formed as an arc surface, the first abuttingmember abutting against and being in point contact with the arc surface.

Optionally, the abutting assembly may include a third abutting member, afirst magnetic member and a second magnetic member, the first abuttingmember may be connected to the driving motor or a housing of the drivingmotor, the first magnetic member may be arranged on a side of the thirdabutting member facing the driving shaft, and the second magnetic membermay be connected to the driving shaft.

Optionally, the abutting assembly may include a third magnetic memberand a fourth magnetic member, the first magnetic member may be arrangedon the driving motor or a housing of the driving motor, and the secondmagnetic member may be connected to the driving shaft and arranged alonga circumferential direction of the driving shaft.

Optionally, the driving assembly may further include a mounting columnconnected to the driving shaft, the second magnetic member beingarranged on the mounting column and opposite to the first magneticmember.

Optionally, the abutting assembly may include a bearing and an elasticmember, an inner ring of the bearing may be fixedly connected to thedriving shaft, and an outer ring of the bearing may be connected to thedriving motor or a housing of the driving motor through the elasticmember.

Optionally, the elastic member may be a spring, one end of the springmay be connected to the driving motor or the housing of the drivingmotor, and the other end may be connected to the outer ring of thebearing.

Another objective of the embodiments of the disclosure is to provide aspraying device, which may include the foregoing driving device.

Another objective of the embodiments of the disclosure is to provide anunmanned aerial vehicle, which may include the foregoing sprayingdevice.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in theembodiments of the disclosure, the drawings used in the description ofthe embodiments of the disclosure or the conventional art will bebriefly described below. It is apparent that the drawings in thefollowing description are only some embodiments of the disclosure, andother drawings can be obtained from those skilled in the art accordingto these drawings without any creative work.

FIG. 1 is a stereogram of a spraying device according to a firstembodiment of the disclosure;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1 according toan embodiment of the disclosure;

FIG. 3 is a schematic structural diagram of a first abutting memberaccording to a first embodiment of the disclosure;

FIG. 4 is a schematic structural diagram of a second abutting memberaccording to a first embodiment of the disclosure;

FIG. 5 is a schematic structural diagram of a housing according to afirst embodiment of the disclosure;

FIG. 6 is a schematic structural diagram of a shell cover according to afirst embodiment of the disclosure;

FIG. 7 is a schematic structural diagram of a connecting columnaccording to a first embodiment of the disclosure;

FIG. 8 is a schematic structural diagram of a spraying tray according toa first embodiment of the disclosure;

FIG. 9 is a schematic structural diagram of a flow guide memberaccording to a first embodiment of the disclosure;

FIG. 10 is a cross-sectional view of a spraying device according to asecond embodiment of the disclosure;

FIG. 11 is a schematic structural diagram of a third abutting memberaccording to a second embodiment of the disclosure;

FIG. 12 is a schematic structural diagram of a mounting column accordingto a second embodiment of the disclosure;

FIG. 13 is a schematic structural diagram of a spraying device accordingto a third embodiment of the disclosure; and

FIG. 14 is a schematic structural diagram of a spraying device accordingto a fourth embodiment of the disclosure.

DESCRIPTION OF THE REFERENCE SIGNS

In the drawing: 11, first abutting member; 111, fixing portion; 112,abutting portion; 1120, extending hole; 1121, elastic abutting piece;113, connecting portion; 1130, avoidance hole; 12, second abuttingmember; 13, third abutting member; 130, first mounting groove; 14, firstmagnetic member; 15, second magnetic member; 16, third magnetic member;17, fourth magnetic member; 18, elastic member; 19, bearing; 20,spraying tray; 21, matching hole; 31, driving motor; 32, driving shaft;321, first end; 322, second end; 33, mounting column; 330, secondmounting groove; 40, housing; 41, main shell; 410, housing cavity; 411,first connecting portion; 412, second connecting portion; 413, groove;42, auxiliary shell; 420, via hole; 43, shell cover; 431, sealingprotrusion; 432, connection port; 50, connecting column; 51, firstcolumn section; 52, second column section; 53, convex ring; 60, flowguide member; 61, flow guide cavity; 70, liquid collecting conduit.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The embodiments of the disclosure are described in detail below, and theexamples of the embodiments are illustrated in the drawings, where thesame or similar reference numerals are used to refer to the same orsimilar elements or elements having the same or similar functions. Theembodiments described below with reference to the drawings are intendedto be illustrative of the disclosure and are not to be construed aslimiting the disclosure.

In the description of the disclosure, it is to be understood that theorientations or positional relationships indicated by terms “length”,“width”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”,“horizontal”, “top”, “bottom”, “inner”, “outer” and the like are theorientations or positional relationships shown in the drawings, and areonly for the convenience of describing the disclosure and simplifyingthe description, rather than indicating or implying that devices orelements must have a specific orientation and must be constructed andoperated in a specific orientation, and therefore it should not beconstrued as limiting the disclosure.

In addition, terms “first” and “second” are only adopted for descriptionand should not be understood to indicate or imply relative importance orimplicitly indicate the number of indicated technical features.Therefore, a feature defined by “first” and “second” may explicitly orimplicitly indicate inclusion of one or more of such features. In thedescriptions of the disclosure, “multiple” means two or more, unlessotherwise limited definitely and specifically.

In the embodiments of the disclosure, unless otherwise specified andlimited, terms “mounting”, “connected” and “connection”, “fixed” and thelike should be generally understood. For example, the term may be fixedconnection or detachable connection or integral connection, the term maybe mechanical connection or electrical connection, and the term may bedirect connection or indirect connection through an intermediate orcommunication inside two elements or interaction between two elements.Those of ordinary skill in the art can understand specific implicationsof the above terms in the embodiments of the disclosure in specificsituations.

In order to make the purposes, technical solutions and advantages of thedisclosure clearer, the disclosure will be further described in detailbelow with reference to the accompanying drawings and embodiments.

The embodiments of the disclosure provide a driving device, a sprayingdevice and an unmanned aerial vehicle. A driving shaft has smallfloating by means of an abutting assembly, a spraying device has a goodspraying effect, and the service life of the device is prolonged.

First Embodiment

Referring to FIG. 1 to FIG. 9, a driving device includes: a drivingassembly and an abutting assembly. The driving assembly includes adriving motor 31. The driving motor 31 has a driving shaft 32. Theabutting assembly is connected to the driving assembly and exerts anacting force on the driving shaft 32 to abut against the driving shaft32.

In some embodiments of the disclosure, an acting force generated by thedriving device is exerted on the driving shaft 32 by the abuttingassembly to abut against the driving shaft 32. In this way, floating ofthe driving shaft 32 along an axial direction is prevented or reduced,thereby avoiding wear of the driving shaft 32 and internal windingsthereof, so that the service life of the driving device is prolonged,the driving shaft 32 of the driving device has small floating, and thespraying device has a good spraying effect.

In some embodiments, the driving assembly further includes a housing 40of the driving motor. The housing 40 of the driving motor has a housingcavity 410 configured to house the driving motor 31. The housing 40 isprovided with a through hole. The driving shaft 32 penetrates throughthe through hole. Specifically, the driving shaft 32 includes a firstend 321 and a second end 322 extending along both sides of the drivingmotor. The first end 321 of the driving shaft 32 penetrates through thethrough hole.

Preferably, the abutting assembly includes a first abutting member 11.The first abutting member 11 is connected to the housing 40 of thedriving motor. Specifically, the first abutting member 11 includes afixed portion 111 and an abutting portion 112. The fixing portion 111 isconnected to the housing 40 of the driving motor. The abutting portion112 abuts against the driving shaft 32 to exert an acting force in anaxial direction on the driving shaft 32.

In other embodiments, the first abutting member 11 may also be connectedto the driving motor 31. The fixing portion 111 of the first abuttingmember 11 may be connected to the driving motor 31.

Optionally, the first abutting member 11 further includes a connectingportion 113 connecting the fixing portion 111 and the abutting portion112. The connecting portion 113 and the abutting portion 112 jointlyform an arched structure. The abutting portion 112, the fixing portion111 and the connecting portion 113 are integrally formed. Specifically,the connecting portion 113 includes a first connecting portion and asecond connecting portion respectively connected to two opposite sidesof the abutting portion 112. The fixing portion 111 includes a firstfixing portion connected to the first connecting portion and configuredto be fixed with the housing 40 of the driving motor or one side of thedriving motor 31 and a second fixing portion connected to the secondconnecting portion and configured to be fixed with the housing 40 of thedriving motor or the other side of the driving motor 31. The firstconnecting portion, the abutting portion 112 and the second connectingportion jointly form an arched structure.

Preferably, referring to FIG. 2 to FIG. 3, the abutting portion 112 ofthe first abutting member 10 is provided with an elastic abutting piece1121. The elastic abutting piece 1121 abuts against the driving shaft32. Therefore, when the axial floating amplitude of the driving shaft 32is too large, the arrangement of the elastic abutting piece 1121 mayprevent the transition abutment between the driving shaft 32 and thefirst abutting member 11, resulting in excessive friction between thedriving shaft 32 and the first abutting member 10, and increasing theenergy consumption of the driving motor.

Referring to FIG. 3, in detail, the abutting portion 112 is providedwith an extending hole 1120, and the elastic abutting piece 13 extendsalong an inner wall of the extending hole 1120.

Optionally, the connecting portion 113 of the first abutting member 11is further provided with an avoidance hole 1130, and the avoidance hole1130 may be used for a connection wire of the driving motor 31 to passthrough.

Referring to FIG. 2 and FIG. 4, in detail, the abutting assembly furtherincludes a second abutting member 12 buckled on the second end 322 ofthe driving shaft 32. An end of the second abutting member 12 away fromthe driving shaft 32 is formed as an arc surface. The elastic abuttingpiece 1121 may abut against the arc surface of the second abuttingmember 12, and the elastic abutting piece 1121 may be in point contactwith the arc surface of the second abutting member 12, so as to reducefriction, and reduce energy consumption.

The embodiments of the disclosure further provide a spraying device,which includes: the foregoing driving device and a spraying tray 20configured to spray liquid. The first end 321 of the driving shaft 32penetrates through a through hole and is fixedly connected to thespraying tray 20 to enable the driving motor to power the spraying tray20. In detail, the spraying tray 20 is a centrifugal spraying tray 20,and the spraying tray 20 is driven to rotate by the driving shaft 32, sothat liquid in the spraying tray 20 is sprayed with a centrifugalchannel on the spraying tray 20. Understandably, the spraying tray 20 isprovided with multiple spaced-apart centrifugal channels along its traysurface, and the liquid is sprayed along the centrifugal channels.

Referring to FIG. 2 and FIG. 7, optionally, the spraying device furtherincludes a connecting column 50 fixedly connected between the sprayingtray 20 and the driving shaft 32. The spraying device is provided withthe connecting column 50 so that the spraying tray 20 and the drivingshaft 32 are fixedly connected. Thus, the driving motor 31 drives thespraying tray 20 to rotate, so that the cooperation between the drivingshaft 32 and the connecting column 50 is more tight and reliable.

With continued reference to FIG. 2 and FIG. 7, optionally, theconnecting column 50 includes a first column section 51 fixedlyconnected to the spraying tray 20 and a second column section 52 fixedlyconnected to the driving shaft 32. The second column section 52 isprovided with an insertion hole. The driving shaft 32 is inserted andfixed in the insertion hole. The second column section 52 is tightlymatched with the driving shaft 32 to ensure that the spraying tray 20rotates with the driving shaft 32. Understandably, the first columnsection 51 and the second column section 52 are integrally formed.Preferably, the first column section 51 and the second column section 52are arranged coaxially, and are arranged coaxially with the drivingshaft 32.

Referring to FIG. 2 and FIG. 8, optionally, the spraying tray 20 isprovided with a matching hole 21. The connecting column 50 is furtherformed with a convex ring 53 along the outer peripheral surface. Thefirst column section 51 is fixed in the matching hole 21. The endsurface of the convex ring 53 abuts against the end surface of thematching hole 21. Meanwhile, a matching surface between the first columnsection 51 and the matching hole 21 is provided as a flat surface toprevent relative rotation between the first column section 51 and thespraying tray 20.

In addition, referring to FIG. 2 and FIG. 5, in this embodiment, thehousing 40 of the driving motor includes a main shell 41 fixedly mountedand configured to house the driving motor 31, and an auxiliary shell 42extending along the periphery of the through hole to the spraying tray20. The main shell 41 is provided with a housing cavity 410 for housingthe driving motor 31. The auxiliary shell 42 is provided with a via hole420 that communicates with the housing cavity 410 and is configured forthe driving shaft 32 to be inserted therein. Preferably, the main shell41 and the auxiliary shell 42 are integrally formed.

Referring to FIG. 5, optionally, a first connecting portion 411 isformed on the top of the main shell 41 in a radial direction, and thefixing portion of the first abutting member 11 is connected to the firstconnecting portion 411.

Referring to FIG. 2 and FIG. 6, optionally, a second connecting portion412 is formed by extending on the top of the first connecting portion411 in a radial direction. A shell cover 43 is connected to the secondconnecting portion 412. A sealing protrusion 431 is arranged on the edgeof the shell cover 43. An assembly groove 413 is provided at the secondconnecting portion 412. The sealing protrusion 431 is inserted into theassembly groove 413 to form a sealed mounting space. Optionally, theshell cover 43 is provided with a connection port 432. The connectionport 432 is suitable for mounting an electrical circuit board. Theelectrical circuit board is suitable for electrically connecting thedriving assembly 31 with a power supply circuit. The electrical circuitboard may be sealed in a glue filling manner.

Referring to FIG. 2 and FIG. 9, optionally, the spraying device furtherincludes a flow guide member 60 and a liquid collecting conduit 70. Theflow guide member 60 is fixedly connected between the main shell 41 andthe spraying tray 20 and forms a flow guide cavity 61 communicating withthe spraying tray 20. A mounting opening communicating with the flowguide cavity 61 is formed between the flow guide member 60 and the mainshell 41. A liquid conduit is fixedly mounted on the mounting openingand communicates with the flow guide cavity 61.

Second Embodiment

Referring to FIG. 10 to FIG. 12, the other aspects of the disclosure arethe same as the first embodiment. The driving device provided by thepresent embodiment is different from the first embodiment only in thatthe abutting assembly in the present embodiment includes a thirdabutting member 13, a first magnetic member 14 and a second magneticmember 15. Specifically, the third abutting member 13 is connected tothe driving motor 31 or the housing 40 of the driving motor, the firstmagnetic member 14 is arranged on a side of the third abutting member 13facing the driving shaft 32, the second magnetic member 15 is connectedto the driving shaft 32, and the first magnetic member 14 is opposite tothe second magnetic member 15. Under the action of force generated bythe first magnetic member 14 and the second magnetic member 15, an axialforce is exerted on the driving shaft 32 to prevent the driving shaft 32from floating in the axial direction during the process of driving thespraying tray 20 to rotate.

Referring to FIG. 11 and FIG. 12, a side of the third abutting member 13facing the driving shaft 32 is provided with a first mounting groove130. The first magnetic member 14 is mounted in the first mountinggroove 130. Preferably, the driving assembly 31 further includes amounting column 33. The mounting column 33 is connected to the drivingshaft 32. The mounting column 33 is provided with a second mountinggroove 330. The second magnetic member 15 is mounted in the secondmounting groove 330 and is opposite to the first magnetic member 14.

In the present embodiment, the third abutting member 13 is connected tothe housing 40 of the driving motor, and the mounting column 33 isfixedly connected to the second end 322 of the driving shaft 32.

In addition, it is also to be noted that the structure of the thirdabutting member 13 in the present embodiment is the same as thestructure of the first abutting member 11 in the first embodiment,except in the abutting portion of the third abutting member 13 and theabutting portion 112 of the first abutting member 11. The same portionsare not described here again. In the present embodiment, a side of theabutting portion of the third abutting member 13 facing the drivingshaft 32 is provided with a first mounting groove 130.

Preferably, the first magnetic member 14 and the second magnetic member15 may be the same.

Third Embodiment

Referring to FIG. 13, the other aspects of the disclosure are the sameas the first embodiment. The driving device provided by the presentembodiment is different from the first embodiment only in that theabutting assembly in the present embodiment includes a third magneticmember 16 and a fourth magnetic member 17. The third magnetic member 16is arranged on the driving motor 31 or the housing 40 of the drivingmotor. The fourth magnetic member 17 is connected to the driving shaft32 and arranged along the circumferential direction of the driving shaft32. The third magnetic member 16 and the fourth magnetic member 17 areoppositely disposed and generate a force, and then generate a force onthe driving shaft 32 to abut against the driving shaft 32 and preventthe driving shaft 32 from floating up and down in the axial direction.

In the present embodiment, the fourth magnetic member 17 is arranged atthe first end 321 of the driving shaft 32, the third magnetic member 16is arranged on an end surface of the driving motor on the side of thefirst end 321 of the driving shaft 32 and arranged along thecircumferential direction of the driving shaft 32, and the thirdmagnetic member 16 and the fourth magnetic member 17 are oppositelyarranged and generate a force.

Understandably, the fourth magnetic member 17 may be arranged at thesecond end 322 of the driving shaft 32, and the third magnetic member 16may be arranged on the end surface of the driving motor on the side ofthe second end 322 of the driving shaft 32.

Fourth Embodiment

Referring to FIG. 14, the other aspects of the disclosure are the sameas the first embodiment. The driving device provided by the presentembodiment is different from the first embodiment only in that theabutting assembly in the present embodiment includes a bearing 18 and anelastic member 19. An inner ring of the bearing 18 is fixedly connectedto the driving shaft 32. An outer ring of the bearing 18 is connected tothe driving motor 31 or the housing 40 of the driving motor through theelastic member 19. The elastic member 19 exerts an acting force on theouter ring of the bearing 18, which in turn exerts an acting force onthe driving shaft 32 to abut against the driving shaft 32 and preventthe driving shaft 32 from floating up and down in the axial direction.

In the present embodiment, the inner ring of the bearing 18 is fixedlyconnected to the first end 321 of the driving shaft 32, one end of theelastic member 19 is fixed to the driving motor 31, and the other end ofthe elastic member 19 is fixedly connected to the outer ring of thebearing 18.

Understandably, in other embodiments, the inner ring of the bearing 18may be connected to the second end 322 of the driving shaft 32. Theouter ring of the bearing 18 is connected to the driving motor 31 or thehousing 40 of the driving motor through the elastic member 19.

Optionally, the elastic member is provided as a spring. One end of thespring is connected to the driving motor or the housing of the drivingmotor, and the other end of the spring is connected to the outer ring ofthe bearing 18.

The above is only the preferred embodiment of the disclosure and is notintended to limit the disclosure. Any modifications, equivalentreplacements, improvements of the disclosure shall fall within the scopeof protection of the disclosure.

1. A driving device, comprising: a driving assembly and at least oneabutting assembly, wherein the driving assembly comprises a drivingmotor, the driving motor has a driving shaft, and the abutting assemblyis connected to the driving assembly and exerts an acting force on thedriving shaft to abut against the driving shaft.
 2. The driving deviceaccording to claim 1, wherein the abutting assembly comprises a firstabutting member, the first abutting member being connected to thedriving motor or a housing of the driving motor.
 3. The driving deviceaccording to claim 2, wherein the abutting assembly comprises a fixingportion and an abutting portion, the fixing portion being connected tothe driving motor or a housing of the driving motor, and the abuttingportion abutting against the driving shaft.
 4. The driving deviceaccording to claim 3, wherein the first abutting member comprises aconnecting portion for connecting the fixing portion and the abuttingportion, the connecting portion and the abutting portion jointly form anarched structure, and the abutting portion, the fixing portion and theconnecting portion are integrally formed.
 5. The driving deviceaccording to claim 4, wherein the abutting portion is provided with anelastic abutting piece.
 6. The driving device according to claim 5,wherein the abutting portion is provided with an extending hole, theelastic abutting piece being formed by extending along an inner wall ofthe extending hole.
 7. The driving device according to claim 2, whereinthe abutting assembly further comprises a second abutting member, thesecond abutting member being buckled on an end of the driving shaftadjacent to the first abutting member.
 8. The driving device accordingto claim 7, wherein an end of the second abutting member adjacent to thefirst abutting member is formed as an arc surface, and the firstabutting member abuts against and is in point contact with the arcsurface.
 9. The driving device according to claim 1, wherein theabutting assembly comprises a third abutting member, a first magneticmember and a second magnetic member, the third abutting member isconnected to the driving motor or a housing of the driving motor, thefirst magnetic member is arranged on a side of the third abutting memberfacing the driving shaft, and the second magnetic member is connected tothe driving shaft.
 10. The driving device according to claim 9, whereinthe driving assembly comprises a mounting column connected to thedriving shaft, the second magnetic member being arranged on the mountingcolumn and opposite to the first magnetic member.
 11. The driving deviceaccording to claim 1, wherein the abutting assembly comprises a thirdmagnetic member and a fourth magnetic member, the third magnetic memberis arranged on the driving motor or a housing of the driving motor, andthe fourth magnetic member is connected to the driving shaft andarranged along a circumferential direction of the driving shaft.
 12. Thedriving device according to claim 1, wherein the abutting assemblycomprises a bearing and an elastic member, an inner ring of the bearingis fixedly connected to the driving shaft, and an outer ring of thebearing is connected to the driving motor or a housing of the drivingmotor through the elastic member.
 13. The driving device according toclaim 12, wherein the elastic member is a spring, one end of the springis connected to the driving motor or the housing of the driving motor,and the other end is connected to the outer ring of the bearing.
 14. Aspraying device, comprising the driving device according to claim
 1. 15.An unmanned aerial vehicle, comprising the spraying device according toclaim
 14. 16. The driving device according to claim 3, wherein theabutting assembly comprises a second abutting member, the secondabutting member being buckled on an end of the driving shaft adjacent tothe first abutting member.
 17. The driving device according to claim 4,wherein the abutting assembly comprises a second abutting member, thesecond abutting member being buckled on an end of the driving shaftadjacent to the first abutting member.
 18. The driving device accordingto claim 5, wherein the abutting assembly comprises a second abuttingmember, the second abutting member being buckled on an end of thedriving shaft adjacent to the first abutting member.
 19. The drivingdevice according to claim 6, wherein the abutting assembly comprises asecond abutting member, the second abutting member being buckled on anend of the driving shaft adjacent to the first abutting member.